Plato, Laws 695d

κοινήν τινα εἰσφέρων, καὶ τὸν τοῦ Κύρου δασμόν, ὃν ὑπέσχετο Πέρσαις, εἰς τὸν νόμον ἐνέδει, φιλίαν πορίζων καὶ κοινωνίαν πᾶσιν Πέρσαις, χρήμασι καὶ δωρεαῖς τὸν Περσῶν δῆμον προσαγόμενος· τοιγαροῦν αὐτῷ τὰ στρατεύματα μετʼ εὐνοίας προσεκτήσατο χώρας οὐκ ἐλάττους ὧν κατέλιπε Κῦρος. μετὰ δὲ Δαρεῖον ὁ τῇ βασιλικῇ καὶ τρυφώσῃ πάλιν παιδευθεὶς παιδείᾳ Ξέρξης— ὦ Δαρεῖε, εἰπεῖν ἐστιν δικαιότατον ἴσως, ὃς τὸ Κύρου κακὸν οὐκ

and he thought good to manage it by enacting laws into which he introduced some measure of political equality, and also incorporated in the law regulations about the tribute-money which Cyrus had promised the Persians, whereby he secured friendliness and fellowship amongst all classes of the Persians, and won over the populace by money and gifts; and because of this, the devotion of his armies won for him as much more land as Cyrus had originally bequeathed. After Darius came Xerxes, and he again was brought up with the luxurious rearing of a royal house: O Darius—for it is thus one may rightly address the father—how is it that you have ignored the blunder of Cyrus,